I shouldn't have to underclock: The CPU is supposed to "throttle back" when it gets too hot. I had previously allowed BOINC to use at most 100% of the cores. I changed it to use at most 50%. I don't see any significant change in temperature.

A Internet search suggested some people have this problem because they didn't remove a protective strip of plastic on the thermal compound when installing the heat sink and fan. I took off the heat sink and fan; it looks like it was properly installed. There wasn't much dust inside the case.

I might mention that the temperature I see reported isn't always accurate. When I am not running BOINC, the CPU temperature ranges from 9 degrees C to 30 degrees. This violates the laws of physics: Without refrigeration, the CPU temp cannot be lower than the room temp.

Off topic:

I know someone who had the Steam installation of the game Riven (sequel to Myst) on Windows 7. He had a problem with the game halting or freezing. After searching the Internet, he fixed it by using an "affinity" feature in Windows that allowed him to limit the game to using a specific CPU core. It didn't matter which core it was.

I wonder if CDPN would run better on operating systems that have this feature if a feature were to be added to BOINC that limited each running task to a specific CPU?

off topic:

I wonder if CDPN would run better on operating systems that have this feature if a feature were to be added to BOINC that limited each running task to a specific CPU?

Linux also allows this. http://www.cyberciti.biz/tips/setting-processor-affinity-certain-task-or-process.html I suspect Mac does as well but have no reason to find out.

This "affinity" business has been brought up lots of times.
It doesn't make much difference.

Left to itself, Windows will swap running processes around among the processors on the chip to minimise continuous hot spots.

If the inside of the case is too hot, leave the cover off, or install more fans.

I haven't used cases for years; they're all built on open boards, so there's nothing to keep in hot air.

The case came with 4 fans: 1 front, 1 rear, and 2 on the side. There is room for 1 more large fan, on the bottom.

The case allows me to wire the front and rear fans to the case instead of the motherboard. This would give me the ability to run the fans at higher speeds, by manually setting switches. But, if I did that, the motherboard would think the fans were missing and sound an alarm.

Most nights my computer is turned off and yet I rarely get a computing error which could be attributed to this. I use the suspend to disk function when turning my computer off. The only errors I have had which could be attributed to turning the machine off and on again have been power failures and rebooting when an update to the kernel has required it.

This is in response to a previous problem (See 16 July and earlier in this thread). I was getting Segment Violation errors.

I reinstalled libc6 and haven't had a single error since.

Not sure why libc6 "went bad" but it looks like I am all set.

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